How to Connect to MathHandwrit.ing with Node.js
In this post, we're diving into how to connect your Node.js application with the MathHandwrit.ing API, a powerful tool designed to interpret handwritten mathematical expressions and convert them into LaTeX format. This functionality is incredibly useful for educational software, note-taking apps, and anywhere mathematical input is needed. Let's get started with the steps to integrate this API into your Node.js project.
Step 1: Register and Obtain Your Bearer Token
Before we can start coding, you need access to the API. Here's how:
- Register on the MathHandwrit.ing website to create an account.
- Once registered, navigate to your API Tokens Page to generate your personal Bearer Token. This token is crucial for authenticating your requests to the API.
Step 2: Setting Up Your Node.js Project
If you haven't already, create a new Node.js project:
- Initialize a new project by running
npm initin your terminal. Follow the prompts to set up your project.
Step 3: Writing the Code to Connect to the API
Now, let's write the actual code to send a handwritten mathematical expression to the MathHandwrit.ing API and receive the LaTeX format in response.
Create a file named convertMathHandwriting.js and add the following code:
const YOUR_TOKEN_HERE = 'YourBearerToken'; // Replace with your actual token
const API_URL = 'https://mathhandwrit.ing/api/detect-with-api';
async function convertHandwrittenMathToLatex(paths) {
try {
const response = await fetch(API_URL, {
method: 'POST',
headers: {
'Authorization': `Bearer ${YOUR_TOKEN_HERE}`,
'Content-Type': 'application/json',
},
body: JSON.stringify({ paths }),
});
if (!response.ok) {
throw new Error(`HTTP error! status: ${response.status}`);
}
const data = await response.json();
console.log('LaTeX expression:', data.latex);
} catch (error) {
console.error('Error converting handwritten math:', error);
}
}
// Example usage
const paths = [
[
{ "x": 12, "y": 35 },
{ "x": 14, "y": 40 },
],
];
convertHandwrittenMathToLatex(paths);
Replace YourBearerToken with the token you obtained earlier. This script uses fetch to make a POST request to the API, sending a JSON body with your handwritten math expression represented as an array of points.
Step 4: Running Your Script
To run your script, simply execute node convertMathHandwriting.js in your terminal. If everything is set up correctly, you should see the LaTeX expression of your handwritten math expression printed in the console.
LaTeX expression: 1234
Example of a Handwritten Math Expression
Here's an example of how you can represent a handwritten math expression as an array of points:
const paths = [
...
Click me
const paths = [
[
{
"x": 70.64676616915423,
"y": 80.38335323383085
},
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"x": 70.64676616915423,
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"x": 70.64676616915423,
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"y": 78.88681592039802
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},
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},
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"y": 118.19029850746269
},
{
"x": 321.39303482587064,
"y": 118.68781094527364
},
{
"x": 321.39303482587064,
"y": 119.18532338308458
},
{
"x": 321.39303482587064,
"y": 120.18034825870647
},
{
"x": 321.39303482587064,
"y": 121.17937313432837
}
]
];
Conclusion
Congratulations! You've just integrated your Node.js application with the MathHandwrit.ing API. This guide covered registering for an API token, setting up a Node.js project, writing the code to connect to the API, and handling potential errors. With this setup, you're now ready to enhance your applications with the ability to convert handwritten mathematical expressions into LaTeX format, opening up a world of possibilities for educational and mathematical tools.